Basic C Practice Problems
Posted on December 18, 2023 by Vishesh Namdev
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Basic Practice Problems based on chapter which you learn in previous Tutorials.
1. Addition of two numbers
#include <stdio.h>
int main () {
// Declare variables to store the numbers
int num1, num2;
// Prompt the user to enter the first number
printf ("Enter the first number: ");
scanf ("%d", &num1);
// Prompt the user to enter the second number
printf ("Enter the second number: ");
scanf ("%d", &num2);
// Calculate the sum
int sum = num1 + num2;
// Display the result
printf ("Sum: %d ", sum);
return 0;
}
int main () {
// Declare variables to store the numbers
int num1, num2;
// Prompt the user to enter the first number
printf ("Enter the first number: ");
scanf ("%d", &num1);
// Prompt the user to enter the second number
printf ("Enter the second number: ");
scanf ("%d", &num2);
// Calculate the sum
int sum = num1 + num2;
// Display the result
printf ("Sum: %d ", sum);
return 0;
}
2. Find the size of int, char, float and double
#include <stdio.h>
int main () {
// Find the size of int
printf ("Size of int: %lu bytes ", sizeof (int));
// Find the size of char
printf ("Size of char: %lu bytes ", sizeof (char));
// Find the size of double
printf ("Size of double: %lu bytes ", sizeof (double));
// Find the size of float
printf ("Size of float: %lu bytes ", sizeof (float));
return 0;
}
int main () {
// Find the size of int
printf ("Size of int: %lu bytes ", sizeof (int));
// Find the size of char
printf ("Size of char: %lu bytes ", sizeof (char));
// Find the size of double
printf ("Size of double: %lu bytes ", sizeof (double));
// Find the size of float
printf ("Size of float: %lu bytes ", sizeof (float));
return 0;
}
1. sizeof(int): Returns the size of an int in bytes.
2. sizeof(char): Returns the size of a char in bytes.
3. sizeof(double): Returns the size of a double in bytes.
4. sizeof(float): Returns the size of a float in bytes.
3. Find the Quotient and Remainders of given number
#include <stdio.h>
int main () {
// Declare variables
int dividend, divisor, quotient, remainder;
// Get input from the user
printf ("Enter the dividend: ");
scanf ("%d", ÷nd);
printf ("Enter the divisor: ");
scanf ("%d", &divisor);
// Calculate quotient and remainder
quotient = dividend / divisor ;
remainder = dividend % divisor ;
// Display the result
printf ("Quotient: %d ", quotient );
printf ("Remainder: %d ", remainder );
return 0;
}
int main () {
// Declare variables
int dividend, divisor, quotient, remainder;
// Get input from the user
printf ("Enter the dividend: ");
scanf ("%d", ÷nd);
printf ("Enter the divisor: ");
scanf ("%d", &divisor);
// Calculate quotient and remainder
quotient = dividend / divisor ;
remainder = dividend % divisor ;
// Display the result
printf ("Quotient: %d ", quotient );
printf ("Remainder: %d ", remainder );
return 0;
}
1.
dividend
is the number to be divided.
2.
divisor
is the number by which the division is performed.
3.
quotient
is the result of the division (dividend / divisor).
4.
remainder
is the remainder of the division (dividend % divisor).
4. Swap two numbers
Swapping two number in C programming language means exchanging the values of two variables. Suppose you have two variable var1 & var2. Value of var1 is 20 & value of var2 is 40.
#include <stdio.h>
int main () {
int num1, num2;
printf ("Enter the first number: ");
scanf ("%d", &num1);
printf ("Enter the second number: ");
scanf ("%d", &num2);
// Swap without using a temporary variable
num1 = num1 + num2 ;
num2 = num1 - num2 ;
num1 = num1 - num2 ;
printf ("After swapping: ");
printf ("First number: %d ", num1 );
printf ("Second number: %d ", num2 );
return 0;
}
int main () {
int num1, num2;
printf ("Enter the first number: ");
scanf ("%d", &num1);
printf ("Enter the second number: ");
scanf ("%d", &num2);
// Swap without using a temporary variable
num1 = num1 + num2 ;
num2 = num1 - num2 ;
num1 = num1 - num2 ;
printf ("After swapping: ");
printf ("First number: %d ", num1 );
printf ("Second number: %d ", num2 );
return 0;
}
Introduction
Control Flow and Decision Making
Functions
Arrays and Strings in C
Pointers in C
Structures and Unions
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